Ventilator.



NITED I STAT S Patentedmfarcblfi, 1904.

P T NT i OFFICE.

' V-EliTILATOR.

SPECIFICATION forming part of Letters Tatent No. 754,895, dated March 15 EQD-d.

Application filed November 1, 1902. Serial No. 129,654- (No model.)

To all whom it mrq concern:

Be itknown that I, FRANK J. PROCHASKA, a citizen of the United States, and a resident of Park River, in the county of \i'alsh and State of North Dakota, have invented anew and use ful Improvement in Yentilators, of which the following is afull, clear, and-exact description. The purpose of the invention is to provide a ventilator especially, adapted for usein conneat-ion with buildings, which will be of simple and durable construction and readily and conveniently opened and closed.

Another purpose of the invention is to provide a ventilator which when opened will afford a direct draft and which when closed will be \vind, s'now, rain, and dust proof, and,

further, to so construct theventilator that the bodycr ventilating tube will be unobstructed and so that the ingress of flies or.other' in-' sects to the body or ventilating tube willbe prevented at all times. i

The invention consists in the novel construction and combination of the several parts, as

will be hereinafter fully set forth, and pointed 18 it rests upon the upper edge oi the body,

out in the claims.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar characters of reference indii v, I

"T -ginal extension-19, pro ecting beyond the ex- ;terior of the body or ventilating Dine.

eate corresponding parts in both figures.

Figure 1 is a,seetional'side elevation of the improved ventilator, the cap being shown 818-. vatedin-dotted lines; and Fig. 2 isa plan view"v of the ventilator, parts being broken away, the cap and its operating mechanism having been removed.

A represents a hollow base of any desired.- shape, and B a body-tube which extends up;

wardlyfrom the base direct and u'nob structed connection therewith.

tion of the. body-tube B at-its inner face, and, as

is best shown in Fig.- 2, this band is provided posing offsets 11 have horizontal f rks 13' firmly secured thereto, each of which to ks carries a preferably grooved pulley 14.

' 5 The upper end ofthe body oryentilating A band-iQ-is riveted o1'-otherwisesecured to the uppe'r'portube B is covered by a screen meter-i211 15, either of metal or of fabric, and casually this screen is held in place by the band! 1 3. The screen 15d0es not materially obstrmet the draft and serves to prevent flies or other insects from entering the body or ventilating tube. A sleeve 16- is mounted to slide within the body or ventilating tube 10, being normally at'the bottom portion of the tube, 5 is shown A in positive lines in Fig. 1. The sir-eve 16 is 9 preferably vertically corrugated, so as to strengthen it and insure the least possible con-- tact of the sleeve with the interior oi the bodytube. .Guide-standards 17 are secnnred to the lower ends of the inner faces of nhesleeve. 16., which standards extend upward loosely. through the guide-openings'lz? of the bodytube and above said body-tube, where the standards 17 are bent toconform to and'engage'with 'the inner face of a preferably conical cap 1' 8, as is best shown in Fig. L The standards are attached "to suitable manner. A

In'the lower or closed position of the cap 7 5' or ventilating tube B,s ealing the upper portionof the tube against the action of the ele- .'ments, and said cap 18 is provided @311 a mar the cap 18 in any This 8e extension ,19 ,is given such cross-sectional "shape, being. shown triangular mhedrawings,'as to form an annnlar cham- -be'r 20, the" lower edge of which when the cap 1 is, closed engages more or less closei r with the e terior-. of .the'. body or ventiisting tube B, and is strengthened, preferably, by a wire reinforcing-bead Q1, best shown in Fig. .1.' The chamber EZGiormsan air-spaeea ound the bbttom of the eap andserv es to break the 9 7 force of any dust or snow that'rnsgr enter. between the. lower edge of the cap the body or ventilating tube. w i Eyes 22 are secured to the lower eadsof opposing standards 12', as is shown Fig. 1, and ropes, cords, o r chains 23 are ward over the puiieys 14 and ire-In thence] downward through the body ocvenriiatingtube B to the base A, where the ropes, cords, I

cord, or chain -24, leadingwithin the building to a convenient point for manipulation.

In operation the cap 18 being closed on the body or ventilating tube B and it is desired 5 to elevate the cap for ventilation to a greater or less extent, it is simplynecessary to draw down on the cord 24, whereupon the cords 23 are brought into action and carry the cap 18, its standards 17, and sleeve. 16 upward, thus creating a desired space between the cap and the upper portion of the body or ventilating tube B, providing for a direct draft It will be understood that the cords 23 may" be fastened after the cap has been elevated to. the desired extent by crowding the said 2 within the building. hen it-is desired to lower the cap, it is simply necessary to loosen the ropes Q3 and 24, whereupon the cap will drop through gravity, and the rapidity of its downward movement can be regulated through said cap havinga marginal triangular eaten sion, the lower wall of which engages the outer surface of the tube when the cap is lowered, standards attached to the cap and passed through the said guide-openings, a guide" sleeve mounted to slide in the tube and to I whichthe lower ends of the standards are Se cured and ropes or chains attached to the lower ends of opposing standards passed up over the pulleys, and thendown the tube to within reach of the operator, as described.

2. In a ventilator, a body or ventilating tube, a screen at the upper end of the tube, pulleys supported by the tube below; the screen, a conical cap for the ventilating-tube, said cap being adapted to rest upon the upper end of said tube and provided with a marginal triangular extension, the lower wall of which is adapted for engagement with the exterior of the ventilatingtube when the said cap is lowered, standards having guided movement in the ventilating-tube and connected with the cap, and ropes or chains connected with the lower portions of opposing standards passed 2 5 the medium of the aforesaid ropes. up over the said pulleys and then down the A ventilatorconstructed as above is exceedtube within reach of the operator, substan 1 iugly simple, durable, and economic and is tially as described.

, efiicient in action. The reen at the'topof v the body of the ventilator eiiectuall'y pre- '3 Vents any foreign material from entering the room or apartment with which the ventilator \"is in communication, and the cap 18 may be @iieniently raised and lowered to give any a ount of draft desired.

airing thus described my invention, I claim as new and desire to secure by Letters Patent- 1. 1n a'\ ventilator, a body or ventilating tube, ascreen at the upper end of the tube,

a reinforcing ing at the upper end of the 4 ventilating-tube, provided with guide-openings, pulleys'located at opposing guide-openings, a' comcalcap for. the ventilating-tube,

. 3. In a ventilator, the combination with 9. 7

tube, of a conical cap having guided move ment on said tube and adapted to rest upon the upper end of the same, said cap having a.

marginal extension, the lowergwall of which- 

